Question

What is the energy in eV required to excite the electron from n = 1 to n = 2 state in hydrogen atom?

• A. 13.6
• B. 3.4
• C. 17
• D. 10.2

Answer 1

The correct option is D 10.2

$△E=E_2-E_1$
$=(-\frac{13.6}{2^2})-(-\frac{13.6}{1^2})$
$=13.6(1-\frac{1}{4})=13.6\times \frac{3}{4}=10.2eV$